.header{
    width: 100%;
    height: 120px;
    overflow: hidden;
    position: relative;
}

.header img{
    height: 120px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.black-nav{
    width: 100%;
    height: 40px;
    line-height: 40px;
    background-color: #fdfdfc;
    color: #b0b0b0;
    font-size: 12px;
}

.wrap{
    width: 1226px;
    margin: 0 auto;
}

.black-nav-left{
    float: left;
}

.black-nav-right{
    float: right;
}

.black-nav li{
    float: left;
    position: relative;
}

.black-nav a{
    color: #b0b0b0;
}

.black-nav a:hover{
    color: #fff;
}

.black-nav span{
    color: #424242;
    margin: 0 3.6px;
}

.cart{
    width: 120px;
    height: 40px;
    background-color: #e7dede;
    margin-left: 25px;
    position: relative;
}

.cart:hover{
    background-color: #fff;
}

.cart:hover>a{
    color: #ff6700;
}

.cart i{
    margin-right: 8px;
}

.cart-list{
    width: 316px;
    height: 0;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(194, 189, 189, 0.15);
    position: absolute;
    right: 0;
    top: 40px;
    color: #424242;
    overflow: hidden;
    transition: all .3s;
    z-index: 750;
}

.cart:hover>.cart-list{
    height: 100px;
    line-height: 100px;
}

.download{
    width: 124px;
    height: 0;
    background-color: #fff;
    box-shadow: 0 1px 5px #aaa;
    position: absolute;
    top: 40px;
    left: 50%;
    margin-left: -62px;
    overflow: hidden;
    transition: all .3s;
    z-index: 800;
}

.download>img{
    width: 90px;
    margin: 18px auto 0;
}

.download>p{
    color: #333;
    font-size: 14px;
    line-height: 14px;
}

.black-nav-left>li:hover>.download{
    height: 148px;
}

